Coadsorption of cyclohexanes and CO on Ni(755): Promoting effect of CO and increase of decomposition fraction by methyl substituent

Hideo Orita, Hiroshi Kondoh, Hisakazu Nozoye

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Coadsorption of methyl-substituted cyclohexanes and CO has been investigated by temperature-programmed desorption (TPD). Coadsorbed CO promotes decomposition of cyclohexanes. Decomposition fraction (ratio of decomposed molecules to adsorbed ones) of cyclohexanes was determined with changing coverages of CO and cyclohexanes. Decomposition fraction increases sharply when a tertiary C-H bond is introduced into a cyclohexane ring by methyl substitution. This is consistent with the fact that dissociation energy of a tertiary C-H bond is smaller than those of primary and secondary C-H bonds.

Original languageEnglish
Pages (from-to)592-595
Number of pages4
JournalApplied Surface Science
Volume121-122
DOIs
Publication statusPublished - 1997 Nov
Externally publishedYes

Keywords

  • CO
  • Coadsorption
  • Promoting effect on decomposition
  • Stepped surface
  • Temperature-programmed desorption

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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